The English I'm studying now(business English) is different from the English my son studyed.He's a middle school student.so the english he studyed is close to spoken english.It's also more close to life.so I often talk with him about everything,such as the soccer, NBA.And he often studys grammar from me.sometimes we have disagreement,but he is always wrong.In this way we'll be able to improve ourselves without pressure but only happiness.He said he would catch up with me one day.But I will also try my best to improve my english speaking skills.maybe in the future I will go abroad with my family